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Finding the Fourth Proportional to 627,615.60, 940,840.20 and 438,075.60

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Solution

The fourth proportional to 627,615.60, 940,840.20 and 438,075.60 is: 656,706.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,615.60 : 940,840.20 = 438,075.60 : x
  2. Step 2: Convert to fraction form
    627,615.60/940,840.20 = 438,075.60/x
  3. Step 3: Cross multiply
    627,615.60x = 940,840.20 × 438,075.60
  4. Step 4: Simplify right side
    627,615.60x = 412,159,135,119.12
  5. Step 5: Solve for x
    x = 412,159,135,119.12/627,615.60
  6. Step 6: Final answer
    x = 656,706.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.